Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Why is my CYA low?

  1. Back To Top    #1
    AgaveTele's Avatar
    Join Date
    May 2014
    Location
    Ripon, CA
    Posts
    6

    Why is my CYA low?

    When testing my CYA, I'm able to see the black dot with the cylinder completely full. Last year I definitely had CYA so why would it be gone now? I live in Central Valley of California (hot in summer). It is my understanding that CYA does not evaporate.

    I'm using test solution purchased from TFTestKits last year. Could it be that I need new solution?

    Thanks,
    Dave
    Dave

    19K gal, plaster, Jandy Stealth 2 HP 2speed pump, Jandy CL 460 cartridge filter, Nature2 Fusion Inground (not using), Jandy LXi 400,000 BTU heater (for spa), Polaris 280 with 3/4 HP booster pump, 3/4 HP Jandy pump for water feature

  2. Back To Top    #2
    ship of fools's Avatar
    Join Date
    Nov 2011
    Location
    Albany, NY
    Posts
    495

    Re: Why is my CYA low?

    Do you get cold in the winter? I am in Upstate NY and lose all of my CYA every winter.
    21,000 gallon inground
    Haywood Sand Filter
    Vinyl Liner

  3. Back To Top    #3
    AgaveTele's Avatar
    Join Date
    May 2014
    Location
    Ripon, CA
    Posts
    6

    Re: Why is my CYA low?

    Very occasionally we might hit freezing at night in winter, but not very often.
    Dave

    19K gal, plaster, Jandy Stealth 2 HP 2speed pump, Jandy CL 460 cartridge filter, Nature2 Fusion Inground (not using), Jandy LXi 400,000 BTU heater (for spa), Polaris 280 with 3/4 HP booster pump, 3/4 HP Jandy pump for water feature

  4. Back To Top    #4
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: Why is my CYA low?

    Now boy, I say boy, that there is a chicken and you are a chicken hawk!

    Every now and then when the water temp is right and the FC is very low it is possible for bacteria to consume CYA. It is generally rare but a little more prevalent this year for some reason.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •